NAME¶
getr, getg, getb, geta - Extract a color component from the current pixel
format. Allegro game programming library.
SYNOPSIS¶
#include <allegro.h>
int getr(int c);
int getg(int c);
int getb(int c);
int geta(int c);
DESCRIPTION¶
Given a color in the format being used by the current video mode, these
functions extract one of the red, green, blue, or alpha components (ranging
0-255), calling the preceding 8, 15, 16, 24, or 32-bit get functions as
appropriate. The alpha part is only meaningful for 32-bit pixels. Example:
int r, g, b, color_value;
color_value = getpixel(screen, 100, 100);
r = getr(color_value);
g = getg(color_value);
b = getb(color_value);
SEE ALSO¶
getr8(3alleg4),
getr_depth(3alleg4),
makecol(3alleg4),
set_color_depth(3alleg4),
exalpha(3alleg4)